Improve dashboard LLM validation UX and report flow

backend/src/api/routes/llm.py

@@ -5,7 +5,7 @@
 # @LAYER: UI (API)
 
 from fastapi import APIRouter, Depends, HTTPException, status
-from typing import List
+from typing import List, Optional
 from ...core.logger import logger
 from ...schemas.auth import User
 from ...dependencies import get_current_user as get_current_active_user
@@ -19,6 +19,20 @@ from sqlalchemy.orm import Session
 router = APIRouter(tags=["LLM"])
 # [/DEF:router:Global]
 
+
+# [DEF:_is_valid_runtime_api_key:Function]
+# @PURPOSE: Validate decrypted runtime API key presence/shape.
+# @PRE: value can be None.
+# @POST: Returns True only for non-placeholder key.
+def _is_valid_runtime_api_key(value: Optional[str]) -> bool:
+    key = (value or "").strip()
+    if not key:
+        return False
+    if key in {"********", "EMPTY_OR_NONE"}:
+        return False
+    return len(key) >= 16
+# [/DEF:_is_valid_runtime_api_key:Function]
+
 # [DEF:get_providers:Function]
 # @PURPOSE: Retrieve all LLM provider configurations.
 # @PRE: User is authenticated.
@@ -47,6 +61,37 @@ async def get_providers(
     ]
 # [/DEF:get_providers:Function]
 
+
+# [DEF:get_llm_status:Function]
+# @PURPOSE: Returns whether LLM runtime is configured for dashboard validation.
+# @PRE: User is authenticated.
+# @POST: configured=true only when an active provider with valid decrypted key exists.
+@router.get("/status")
+async def get_llm_status(
+    current_user: User = Depends(get_current_active_user),
+    db: Session = Depends(get_db)
+):
+    service = LLMProviderService(db)
+    providers = service.get_all_providers()
+    active_provider = next((p for p in providers if p.is_active), None)
+
+    if not active_provider:
+        return {"configured": False, "reason": "no_active_provider"}
+
+    api_key = service.get_decrypted_api_key(active_provider.id)
+    if not _is_valid_runtime_api_key(api_key):
+        return {"configured": False, "reason": "invalid_api_key"}
+
+    return {
+        "configured": True,
+        "reason": "ok",
+        "provider_id": active_provider.id,
+        "provider_name": active_provider.name,
+        "provider_type": active_provider.provider_type,
+        "default_model": active_provider.default_model,
+    }
+# [/DEF:get_llm_status:Function]
+
 # [DEF:create_provider:Function]
 # @PURPOSE: Create a new LLM provider configuration.
 # @PRE: User is authenticated and has admin permissions.
@@ -204,4 +249,4 @@ async def test_provider_config(
         return {"success": False, "error": str(e)}
 # [/DEF:test_provider_config:Function]
 
-# [/DEF:backend/src/api/routes/llm.py]
+# [/DEF:backend/src/api/routes/llm.py]